ˈ ̷ ̷ˌ ̷ ̷ noun
Etymology: alteration (influenced by wall ) (I) of earlier walwort danewort, from Middle English walwort, walwurt, from Old English wealhwyrt, literally, foreign herb, from Wealh Welshman, foreigner + wyrt herb, root; probably from the belief that it grew where Welsh blood was spilled — more at welsh , wort
: any of several plants that grow on or in walls: as
a. : danewort
b. : wall pellitory
c. : a stonecrop ( Sedum acre )
d. : wall rue